A four-year investigation into alleged war crimes in Afghanistan by Australian special forces was made public by the Chief of Defence Angus Campbell.   The key revelation from the report include the alleged unlawful killing of 39 Afghan civilians and prisoners by Australian troops between 2009 and 2013.   19 of those soldiers have been referred to the Australian Federal Police for prosecution over their war crimes charges.   In this briefing, we are joined by David Kilcullen, an Australian author, strategist, and counterinsurgency expert to explain what has happened in this dark chapter of Australian military history and how to stop it from ever happening again.   In today's headlines: Oxford vaccine at least 70% effective as Qantas CEO confirms vaccine mandatory Allegations NSW Premier Gladys Berejiklian failed to isolate after COVID-19 test More than 100 former Republican officials demand Trump concession   Follow The Briefing Instagram: @thebriefingpodcast  Facebook: TheBriefingNewsAU Twitter: @TheBriefingAU  See omnystudio.com/listener for privacy information.